Carbureter.



G. M. SGHEBLER.

GAEBURETER.

APPLICATION FILED APR.5, 1909.

Patented 0015.4, 1910.

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GEORGE M. SCHEBLER, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO WHEELER &

SCHEBLER, OF INDIANAPOLIS,

ravijn eric f INDIANA, A COPARTNERSHIP.

CARBURETER.

Specification of Letters Patent.

Patented Oct. 4, 1910.

Application led April 5, 1909. Serial No. 487,911.

To all whom it may concern:

Beit known that I, GEORGE M. SCIIEBLER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

The object of my invention is to produce certain details in construction of a carbureter by means ofwhich the inward flow of air upon the valves will act uniformly thereon; by means of which the air valves may, under different speeds of the engine, admit varying supplies of air by the production of variable openings; by means of which the effect of movement of the throttle valve upon the fuel supply 'valve may be varied by proper adjustment, 1nd to produce such further improvements in details of construction as shall. be hereinafter pointed out.

The accompanying'drawings illustrate my invention.

Figure l is a side elevation in partial ver tical section; Fig. 2 a plan in partial horizontal section.

In the drawings, l() indicates the iioat chamber of an ordinary and well known type, the flow of oil therefrom being controlled by means of a needle valve, the stem l1 of which is movable axially so as to vary the opening thereofrelative to the position of the throttle valve l2 in a manner similar to that shown in my Patent No. 886,545.

In carbureters of the present'time difficulty is experienced in the actuation of the air inlet valves owing to the fact that the incoming air tendsto take the shortest path of travel past-the air valves into the interior of the earbureter and, as the opening between the valve and the interior of the carbureting chamber has i heretofore been -formed along this shortest path, the incoming air acts upon one side of the valve more than it does upon the opposite side and thereby tends to tip or cant the valve and retard its movement. I have found in prac- 'tice that this diiculty can be avoided by armetrically opposite sides, there is a uniform yield of the valve which thus insures a steady working of the valve and a uniform supply of air.

In practice difliculty has heretofore been experienced in so adjusting the single air valve that the carbureter will work satisfactorily not only upon high speeds but upon factory air admission throughout the range ofspeed of the engine. Difficulty has also been experienced by reason of the tendency of the valves to suddenly close and in order to obviate these two diiiiculties I provide the following construct-ion: The air inlet 3l has an inwardly presented annular seat 52 upon which is seated an annular inlet valve 53. This valve 53 is carried by a spider 54 carried by a sleeve 55 which passes through a bearing 56 formed in the cylinder member 57. Secured to the lower end of sleeve 56 is a cylinder 58 which, at its lower end, is provided with a piston flange 59 fitting loosely a cylinder 60 forming part of the cylinder member 57. The cylinder 58 is provided with a head 6l against which a spring 62 acts, said spring resting upon an adjustable abutment 63, and tending to hold the annular valve 53 to its seat. A ball valve 64 forms a communication through piston 59 v adjustable abutment 69 carried by head 6l. Y

Piston 66 is secured to the lower end of a valve stem 7l which passes up through sleeve 65 and carries a valve 72 which seats in the inner diameter of the annular valve The pistons 59 and 66 fit their cylinders somewhat loosely, in the manner of ordinary dash pot pistons, and the ball valves 6a and 67 operate as ordinary4 valves in common dash pot constructions, the said pistons and cylinders merely forming dash pots for the valves 52 and 7 2 in order that, in their. Closing action, they may be'a little more sluggish than in opening.

The operation is as follows: A suction induced in passage 32 affects chamber 3l upon dianietrically opposite sides of stem and valve 72 yields to permit an inflow of air through the annular valve 53 and the inflow of air is uniform and there is no tendency. to tip the valve 72 because there is no short passage from the valve to passage 32. If'the suction within passage 32 is greater than can be supplied by a yield of valve 7 2 the annular valve 53 will also yield thus increasing the inlet so as-to increase the supply .of air entering the carbureter. The exact relation of the two valves maybe adjusted by means of the adjusting screws 63 and 69. It will be readily understood that, as the valves 72 and 52'open, the air within the cylinders 58 vvand 60 respectively will pass out through the pistons quite readily past the valves 67 and 64 but on the ret-urn stroke the valves 64 and 67 will seat themselves and thus require the cylinders to be filled with air which will leak past the pistons and this leakage will be slow.

I claim as my invention ,y l. A carbureter comprising a mixing chamber, a supply passage, an inlet chamber,I

rangedbetween the inlet chamber and the air passage in the direct line between the air inlet chamber and the mixing chamber whereby the air passage is bifurcated adjacent the air inlet chamber and communicated with the air inlet chamber at substantially diametrically opposed points.

,3. In a carbureter, an annular inlet valve, a hollow stem carryin said annular valve, a dash-pot piston carrying said stem, a dashpot cylinder coperating with said piston, a dash-pot cylinder formed in said piston, a

dash-pot piston mounted in said last mentioned cylinder, a stem carried by said last mentioned piston and-extending through the aforesaid hollow stem, a valve carried by said stem'and seated in the annular valve, and means for yieldingly holding said valves with different pressures to their seats.

4. In a carbureter, an annular inlet valve, a hollow stem carrying said annular valve, a

f dash-pot piston carrying said stem, a dashpot cylinder coperating with said piston, a

l dash-pot cylinder formed in said piston, a

dash-pot pistonmounted in said last mentioned cylinder, a stem carried by said last mentioned piston and extending through the aforesaid hollow stem, a Valve carried by said stem andseated in the annular valve', a spring engaging the lirst mentioned piston,

a second'but lighter spring carried by said first mentioned l piston and engaging the second'piston, and means for independently adjusting the force of said springs.

5. In a carbureter, an annular inlet valve,

a hollow stem carrying said annular valve, a dash-pot piston carrying said stem, a dashpot cylinder coperating with said piston, a

dash-pot cylinder formed in said piston, a

dash-'pot mounted in said last mentioned cylinder, a stem carried by said last mentionedpiston and extending through the aforesaid ho'llow stem, a valve carried by said stem and seated in the annular Valve, a spring engaging theiirst mentioned piston, and a second but light spring carried by said first mentioned piston` and engaging the second I piston.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana,

this fourth day of March, A. D. one thousand nine hundred andnine.

GEORGE M. SGHEBLER. [ns] Witnesses:

ARTHUR M. Hoon, THOMAS W. MoMEANs. y 

